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Forensic
Examination Standards
Forensic
Examination Standards
A
complete, competent forensic computer and data examination:
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Ensures
that all examinations use properly prepared and verified, forensically
sterile media. This ensures that there is no contamination by viruses',
no contamination by previously examined data from another or the same case,
and no contamination by other data that could be on the media.
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Examines,
describes and properly documents the hardware that is the subject of the
examination.
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Ensures
that the original media and data are maintained in their original unaltered
state during the examination. This will prevent loss or alteration of the
original data and can be used to authenticate the validity of the data
recovered. It will also be a sound defense to lawsuits claiming alteration
or corruption of the data or operating system.
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Ensures
that no unauthorized writes are made to the original media by viruses,
by "booby trap" defense schemes, by the operating system, by applications
that write back to the media to cache data, or by other inadvertent means.
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Recovers,
unlocks and accesses deleted files, hidden files or data, password protected
files and encrypted files. Any means of concealing the data is documented
for possible use as evidence later.
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Lists
all of the files in the directory hierarchy, including recovered files.
The name, size, time and date of creation or last modification of each
file is documented.
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Examines
data in unallocated space (space that is not currently in use by files
but which may contain data) for data relevant to the investigation or inquiry
at hand. Potentially relevant data is recovered, printed or copied to other
media (such as read-only CD ROM) and the location where the data was found
is documented as appropriate.
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Examines
data in file slack (the area within the last cluster of a file that is
not being occupied by the file) for data relevant to the investigation
or inquiry at hand. Potentially relevant data is recovered, printed
or copied to other media (such as read-only CD ROM) and the location where
found is documented as appropriate.
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Examines
all normal data files individually. Relevant files are printed or copied
to other media (such as read-only CD ROM) and the location where found
is documented as appropriate.
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If
requested, examinations are conducted to determine the author and creation
or modification date of particular documents or files, to determine who
created particular directories, to determine which computer in an office
or location created certain diskettes, and similar comparisons relating
to document and file creation and authentication, etc.
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All
media, exhibits and other items of potential evidence are properly secured
and tightly controlled to maintain their integrity and the physical "chain
of custody".
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A report
is prepared indicating the physical description of the computer and media,
the configuration of the equipment, what was found, any attempt to hide
data, opinions and other comments that may be relative to the inquiry at
hand. The report will explain any technical issues or opinions in a manner
that can be easily understood.
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Limited
examinations can also be conducted. These examinations are conducted with
the same controls that preserve the original media, prevent contamination,
etc. However, these examinations are limited in scope by the requirements
of the client.
We
fully comply with the IACIS®
forensic examination standards (Actually, we wrote them).
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